STM32F030模拟比较器COMP1不能控制PWM1

kinto 提问时间：2019-7-9 09:06 /

程序代码如下：
void TIM1Configurate(void)
{
unsigned int uiChannelDuty;

  TIM_OCInitTypeDef    TIM_OCInitStructure;
  TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
  GPIO_InitTypeDef       GPIO_InitStructure;
  TIM_BDTRInitTypeDef    TIM_BDTRInitStructure;
  //GPIOA clock enable
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
  //TIM1 clock enable
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
  TIM_DeInit(TIM1);
  TIM_InternalClockConfig(TIM1);

  //GPIOA(PA8,PA9)Configuration: PA8->TIM1_CH1, PA9->TIM1_CH2
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  GPIO_PinAFConfig(GPIOA, GPIO_PinSource8, GPIO_AF_2);
  GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_2);

  uiChannelDuty = 100;//(uint16_t) (((uint32_t) MOS_OPEN*600)/100);

  //Time Base configuration
TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
  TIM_TimeBaseStructure.TIM_Prescaler = 0;
  //TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_CenterAligned2;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_TimeBaseStructure.TIM_Period = PWMPeriod;
  TIM_TimeBaseStructure.TIM_ClockDivision = 0;
  TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
  TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

  //Channel 1 and 2 Configuration in PWM mode
TIM_OCStructInit(&TIM_OCInitStructure);
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
  TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCPolarity_Low;
  TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
  TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;
  TIM_OCInitStructure.TIM_Pulse = uiChannelDuty;//Channel1Pulse;
  TIM_OC1Init(TIM1, &TIM_OCInitStructure);

TIM_OCStructInit(&TIM_OCInitStructure);
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
  //TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
  //TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCPolarity_Low;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
  TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
  TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;
  TIM_OCInitStructure.TIM_Pulse = 600 - uiChannelDuty;
  TIM_OC2Init(TIM1, &TIM_OCInitStructure);

  TIM_SelectOCREFClear(TIM1,TIM_OCReferenceClear_OCREFCLR);
  TIM_ClearOC1Ref(TIM1, TIM_OCClear_Enable);
  TIM_ClearOC2Ref(TIM1, TIM_OCClear_Enable);

  //TIM1 Main Output Enable
  TIM_CtrlPWMOutputs(TIM1, ENABLE);
  //TIM1 counter enable
  TIM_Cmd(TIM1, ENABLE);
  //TIM_SelectOutputTrigger(TIM1, TIM_TRGOSource_Update);
}

PWMl输出正常
void ComparerConfigurate(void)
{
  //DAC_InitTypeDef DAC_InitStructure;
  COMP_InitTypeDef  COMP_InitStructure;
GPIO_InitTypeDef  GPIO_InitStructure;
  //RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC , ENABLE);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);

GPIO_StructInit(&GPIO_InitStructure);
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;// | GPIO_Pin_0;
  //GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
  //COMP_DeInit();

//COMP1 Init: the higher threshold is set to VREFINT ~ 1.22V but can be changed to other available possibilities
  COMP_StructInit(&COMP_InitStructure);

COMP_InitStructure.COMP_InvertingInput = COMP_InvertingInput_VREFINT;
  COMP_InitStructure.COMP_Output = COMP_Output_TIM1OCREFCLR;
  COMP_InitStructure.COMP_OutputPol = COMP_OutputPol_NonInverted;
  //COMP_InitStructure.COMP_Mode = COMP_Mode_HighSpeed;
COMP_InitStructure.COMP_Mode = COMP_Mode_UltraLowPower;
  COMP_InitStructure.COMP_Hysteresis = COMP_Hysteresis_No;
//COMP_InitStructure.COMP_Hysteresis = COMP_Hysteresis_High;
  COMP_Init(COMP_Selection_COMP2, &COMP_InitStructure);

//COMP_GetOutputLevel(COMP_Selection_COMP1);

  //COMP_SwitchCmd(DISABLE);
  //COMP_WindowCmd(DISABLE);
  COMP_Cmd(COMP_Selection_COMP2,ENABLE);
}

我想用比较器COMP1控制PWM1的通断，当PA1大于1.2V时，PWM1关断，当PA1小于1.2V时，PWM1正常输出，但不管PA1怎么样，pwm1都有输出